Macon County, Illinois

Macon County, Illinois
Location within the U.S. state of Illinois
Coordinates: 39°52′N 88°58′W / 39.86°N 88.96°W / 39.86; -88.96
Country United States
State Illinois
FoundedJanuary 19, 1829
Named afterNathaniel Macon
SeatDecatur
Largest cityDecatur
Government
 • County Board ChairpersonKevin Greenfield
Area
 • Total
586 sq mi (1,520 km2)
 • Land581 sq mi (1,500 km2)
 • Water5.2 sq mi (13 km2)  0.9%
Population
 (2020)
 • Total
103,998
 • Estimate 
(2024)
100,737
 • Density179/sq mi (69.1/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districts13th, 15th
Websitemaconcounty.illinois.gov

Macon County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 103,998. Its county seat and most populous city is Decatur.

Macon County comprises the Decatur, IL Metropolitan Statistical Area.